1. Human-Life Radio Technology Research Section, Department of Radio Technology Research; Electronics and Telecommunications Research Institute, Gajeong-dong; Yueseong-gu Daejeon South Korea
2. School of Information and Communication Engineering; Chungbuk National University; Cheongju-si Chungbuk South Korea
3. Agency for Defense Development; Sunam-dong, Yueseong Daejeon South Korea